Siamese RTG 2.5

[recidivist]

 Newly arrived here is this software in nice plastic  box/cover ,manual, one Amiga disk,one Windows disk---and quick glance through manual mention DONGLE which I cannot find in package !It is a used item.
Anyone know how or where to get dongle ? Or how to use without same ?
If nothing else  the package looks neat! Like a Disney VHS movie box-lots of color pics.

[recidivist]

 OK ,thanks.

 Will try it then;didn't want to waste time and get upset over missing piece.

 Going to use serial at first.
 Been moving furniture and desks to set up my classics again.
 But then I took a break and watched Das Boot-powerful movie.